#!/bin/bash

# Copyright 2015 The Kubernetes Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# A script to help with haproxy reloads. Needs sudo for :80. Running it for the
# first time starts haproxy, each subsequent invocation will perform a
# soft-reload.
# -f config file
# -p pid file
# -D run as daemon
# -s soft reload, wait for pids to finish handling requests
# -f send pids a resume signal if reload of new config fails

exec 200<$0
# Block till we can acquire an exclusive file lock:
flock 200

socat /tmp/haproxy - <<< "show servers state" > /var/state/haproxy/global

haproxy -f /etc/haproxy/haproxy.cfg -p /var/run/haproxy.pid -D -sf $(cat /var/run/haproxy.pid)

flock -u 200
